What scope

[Rockhopper]

Something like this?

http://www.ebay.co.uk/itm/161432728494? ... EBIDX%3AIT

[tackb]

have a look for a secondhand optolyth

[Rockhopper]

So, for info, I bought the one on Ebay I linked to above. Its fine at 25 yards, infact I'd go so far as to say its its very good. Outside at 100 yards though the maximum magnification is only good enough to get all three targets in view rather than just one and the focus just isn't sharp enough to be able to make out bullet holes even with a backer. Its actually fairly useless which is shame given its performance indoors.
So, the search (and expenditure) goes on!!